My XE nova on throttle bodies (Project 275+bhp)

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Originally Posted by philip

looking good, what spec is the engine going? and whats been done to the head? just ive had some problems with a certain companies steel caps failing thats all. alos if need any pistons, cams, etc drop me a pm.

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Hi Philip
Cheers mate the spec is as follows:

QED 45mm DTH tb's
syntec adjustable fpr
bosch green injectors (apparently from a porsche turbo :confused: )
DTA S40 ecu
QED/ DTA loom with a innovate wideband
Cometic steel head gasket
88mm Wossiner piston 12.6:1 ratio
steel rods
Forged 4340 steel knife edged crank
ACL big end and main bearings
ARP head & main studs, rod bolts, flywheel bolts
Bottom end lightened and balanced
4-2-1 manifold and 2.5" straight though exhaust.
ttv lightweight flywheel
Helix 4 paddle clutch
F28 (YES 6 SPEED ON A XE WITH A FLAT FLYWHEEL lol )

Im adding a pace dry sump kit over the winter, a set of sbd cams the biggest ones. and a CNCed head ported and polised with a 25% airflow increase iirc with +1mm bigger valves etc.
Hope this helps

If I think of anything else ill add it to the list

if want a proper cnc head go through martin bowyer matey. i wouldnt go through cncheads imho. cam wise id also speak to martin. im running newmans full race but then im only looking at about 260bhp or so and peaking at 8k. if you've gone steel crank then id think your looking at 9k rpm up? btw which crank have you gone for?

and if want decent springs/caps let me know i get discount from catcams and newman also if went for something custom too. you would want a 27mm port bore on the inlets if looking for circa 270bhp. JRE go as far as a 28mm parallel port bore but you have to weld the undersied of the inlets up as it breaks through.

ive got a speiss F3 head im reworking for a lad if wanted i can take measurments so you can see what your having done. but i know the ex ports are matched to the gaskets only. its the inlets which have more work and for the cost of a cnc head unless competing then theres nothing wrong with having one port biored then finished by hand

thats going to be fast

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Originally Posted by philip

if want a proper cnc head go through martin bowyer matey. i wouldnt go through cncheads imho. cam wise id also speak to martin. im running newmans full race but then im only looking at about 260bhp or so and peaking at 8k. if you've gone steel crank then id think your looking at 9k rpm up? btw which crank have you gone for?

and if want decent springs/caps let me know i get discount from catcams and newman also if went for something custom too. you would want a 27mm port bore on the inlets if looking for circa 270bhp. JRE go as far as a 28mm parallel port bore but you have to weld the undersied of the inlets up as it breaks through.

ive got a speiss F3 head im reworking for a lad if wanted i can take measurments so you can see what your having done. but i know the ex ports are matched to the gaskets only. its the inlets which have more work and for the cost of a cnc head unless competing then theres nothing wrong with having one port biored then finished by hand

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Im using a autosprint crank mate. as for the valvetrain equiptment ill be using SBD's as they match the cams with the lobes being so big its the only stuff I can run and the power band of the cams is from 2500 to 9700 quoted on sbd. im looking at using a cnc head so the ports are going to be equal across all 4 as what im looking for is going to be that close everything needs to be right first time.

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Originally Posted by BMW335I

thats going to be fast

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Cheers im actually basing the updated spec on 292bhp+ that sbd build but if i can get over 275bhp on a dyno dynamics RR ill be happy because that in theroy should be about 400bhp per tonne

what are you using the car for matey? are you running slipper or pot type pistons? just if on pot type then personally you dont want to rev the engine anywhere near 9.7k, pistons will be too heavy.

as for the head: http://www.ultimatep.com/shopinfo_port_machining.asp said to be best in the country compared to rick woods, northampton motorsport etc.

dont want to seem a **** btw, just some advice thats all as i know how much a decent xe costs

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Originally Posted by philip

what are you using the car for matey? are you running slipper or pot type pistons? just if on pot type then personally you dont want to rev the engine anywhere near 9.7k, pistons will be too heavy.

as for the head: http://www.ultimatep.com/shopinfo_port_machining.asp said to be best in the country compared to rick woods, northampton motorsport etc.

dont want to seem a **** btw, just some advice thats all as i know how much a decent xe costs

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Its for drag racing and circuit car mate bit of a all rounder really. the pistons are pot type mate. I'm hoping they will be ok the cams im getting are supplied in both of sbd's 272 (this uses pot pistons) and 290 kits (uses slipper pistons) and I have had a good chat with the guy when I was pricing things up and he the engine spec was fine.

ah fair enough matey, will be nice to see it once built:D just that i know the wossners are quite a heavy piston thats all compared to likes of cp and omegas so may have an affect at such high rpm, but if enigne builder said its ok then fair enough:D

cheers Philip The weight of the pistons are 298grams each so I dont know how that fair up. Cheers for the advice though mate:thumb:

not bad then, but def have a rethink on the cam front as really you dont need to go any higher than 9k rpm or even 8.5k imho you'll be having to rebuild it every 12months easily and replace half the parts too. ill have a chat with martin bowyer if you'd like and see what he suggests cam wise that would see you around the 270+ bracket, but i know his answer would be go for more grunt than peak. dont forget the kitcars sbd tends to test their engines in are alot lighter than a nova or corsa etc so even less strain on everything.